using System;
using System.Collections.Generic;
namespace FL
{
public static class MathUtils
{
///
/// 传递一个概率值(1-10000),返回随机结果是否在概率内
///
/// 1-10000
/// 最大值
///
public static bool Random(int probability, int maxExclusive = 10000)
{
//零固定返回false
if (probability <= 0) return false;
if (probability < maxExclusive)
{
var random = UnityEngine.Random.Range(0, maxExclusive);
return random < probability;
}
return true;
}
///
/// 传递一个权重数组,返回随机结果对应的索引
///
///
///
public static int Random(IList weights)
{
var total = 0;
foreach (var weight in weights)
{
total += weight;
}
if (total <= 0)
{
return 0;
}
var random = UnityEngine.Random.Range(0, total);
var temp = 0;
for (var i = 0; i < weights.Count; i++)
{
temp += weights[i];
if (random < temp)
{
return i;
}
}
XGame.Log.Error($"随机数错误。total:{total} total:{random}");
return 0;
}
///
/// 毫秒转指定格式的时间字符串
///
///
/// 字符串格式, 例: @"mm\:ss"
///
public static string ToTimeString(this long milliseconds, string format)
{
var timeData = TimeSpan.FromMilliseconds(milliseconds);
return timeData.ToString(format);
}
}
}